body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
    color: #333;
}

header {
    background-color: #3498db;
    color: #fff;
    padding: 1em 0;
    text-align: center;
}

header h1 {
    margin: 0;
}

main {
    padding: 20px;
    max-width: 800px;
    margin: 20px auto;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

ul {
    list-style: none;
    padding: 0;
}

ul li {
    margin-bottom: 10px;
    text-align: center;
}

ul li a {
    text-decoration: none;
    color: #007bff;
    font-weight: bold;
}

ul li a:hover {
    text-decoration: underline;
}